Who Is an Example of a Latch-Key Child

Who is an example of a latch-key child?

A) After school, Donna's mother drives her to a child care center, and then the mother goes to work.
B) After school, Kaito returns to an empty home and waits two hours before his parents arrive.
C) After school, Bandile returns to his home, where his grandmother makes him a snack.
D) After school, Darya takes a school bus to a family child care home in her neighborhood.